Seamless Steel Pipe Wall Thickness and Pressure Comparison Table

1. In the table, CS means carbon steel seamless pipe, applicable material GB8163 "Seamless steel pipe for fluid transportation", GB3087 "Seamless steel pipe for low and medium pressure boiler", GB6479 "High pressure seamless steel pipe for fertilizer equipment", GB9948 "Petroleum 20# in "Seamless Steel Pipe for Cracking";

SS1 stands for stainless steel seamless pipe, applicable to 304L (00Cr19Ni10) and 316L (00C17Ni14Mo2) in GB14976 "Stainless Steel Seamless Steel Pipe for Fluid Transport";

SS2 stands for stainless steel seamless steel pipe, applicable to 304 (0Cr18Ni9) and 316 (0C17Ni12Mo2) in GB14976 "Stainless Steel Seamless Steel Pipe for Fluid Transport";

2. The applicable temperature range of the seamless steel pipe wall thickness in the table is -20~+150℃, the corrosion margin is 2.0mm for carbon steel, and 0 for stainless steel seamless pipe. Pay attention to relevant specifications and requirements when selecting.

3. The seamless steel pipe standard adopts GB17395-2008 seamless steel pipe size, shape, weight and allowable deviation.

4. The calculation in this table is based on GB/T 20801.1-2006 Pressure Piping Specification Industrial Piping

5. Class is the pressure rating of the American standard seamless steel pipe, which is converted to MPa: Class150 is equivalent to the American standard pressure rating of 2.0Mpa; Class 300 is equivalent to 5.0Mpa; Class 400 is equivalent to 6.8Mpa; Class 600 is equivalent to 11.0 Mpa; Class 900 is equivalent to 15.0Mpa; Class 1500 is equivalent to 26.0Mpa; Class 2500 is equivalent to 42.0Mpa.

Tips: ASTM A53 covers seamless and welded steel pipe with nominal wall thickness. ASTM A53 Grade B is more popular than other grades. These pipes can be bare pipes without any coating, or it may be Hot-Dipped or Zinc-Coated and manufactured by Welding or by a Seamless manufacturing process. In Oil and Gas, A53 grade pipes are used in the structural and non-critical applications.